The Blue Planet: Seas of Life - Tidal Seas/Coasts [DVD]

For most of the year, both poles are dark and bitterly cold. But there is still life at both ends of the Earth. Antarctica is a continent, a land mass in its own right surrounded by ice, where stubborn emperor penguins winter in temperatures below -50 degrees Celsius. The Arctic is a frozen sea surrounded by land, and here the polar bear rules - no seal, whale or bird is safe.